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3.6 Blast System Air Quality
Air quality is crucial to the operation of an abrasive blaster. Moisture and contaminants can
cause components to malfunction. Moisture condensation in a blast system causes abrasive flow
problems. Condensation occurs when the hot vapor-filled compressed air cools as it reaches the
abrasive blaster. Water droplets formed during condensation can be absorbed by the abrasive in
the blast vessel which can cause erratic flow to the abrasive valve. To minimize the chance of
abrasive flow problems a moisture removal device installed for the blast system air supply is
highly recommended (i.e. coalescing moisture separator, air-cooled aftercooler or deliquescent
dryer). Contact a local authorized Schmidt® distributor or Axxiom Manufacturing, Inc. to
locate one near you.
3.7 Electrical Requirements
On units equipped with electric blast controls the supply voltage is 12Vdc or 24Vac. The
maximum power required is:
1-outlet: 7 watts 1-outlet with abrasive cutoff: 14 watts
2-outlet: 14 watts 2-outlet with abrasive cutoff: 28 watts
Note: Insufficient electric power output will result in malfunctioning of the electric blast
control system. A power transformer or power supply can be used if the above voltages are not
readily available.
Electric shock hazard. Abrasive blasters with electric deadman blast control systems must
operate on low voltage supply (12-24 volts). To minimize shock hazard only use low voltage
sources and use caution when connecting the power to the abrasive blaster.
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